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Making an Emergency Call
Walking or driving very slowly may also
substantially reduce GPS performance.
Even where location information can be
calculated in such situations, it may take much
longer to do so, and your location estimate may
not be as accurate.
Even where adequate signals from multiple
satellites are available, your GPS feature will
only provide an approximate location, often
within 45 meters (150 feet) but sometimes
much further from your actual location. Advice
on how to improve GPS performance is
provided in “Enhancing GPS Performance” on
page 181.
While the GPS feature of your handset can be a
valuable navigational aid, it does not replace the
need for careful navigating and good judgment.
Never rely solely on one device for navigation.
Remember that the accuracy of the location
information and the time needed to obtain it will
vary depending on circumstances, particularly the
ability to receive signals from adequate numbers of
satellites.
The satellites used by the GPS feature of your
handset are controlled by the U.S. government and
are subject to changes implemented in accordance
with the Department of Defense GPS user policy
and the Federal Radionavigation Plan. These
changes may affect the performance of the GPS
feature of your handset.
Making an Emergency Call
Dial 911 to be connected to an emergency
response center. If you are on an active call, you
must end it before calling 911.
When you make an emergency 911 call, the GPS
feature of your handset begins to seek information
to calculate your approximate location.
It will take
the GPS feature of your handset some time to
determine your approximate location.
Even
where your handset has good access to sufficient
GPS satellite signals and network assist data, it
may take 30 seconds or more to determine the
approximate location. This time will increase where
there is reduced access to satellite signals. When
your approximate location is determined, it is made
available to the appropriate emergency response
center.
